Film reel for cinematograph apparatus



g- 29, 1933 1 L. GOLDHAMMER Er AL 1,924,093

FILM REEL FOR CINEMATOGRAPH APPARATUS Filed Sept. 17, 1931 I lnvenfolrs: By Aflorney Patented Aug. 29, 1933 friction earl T oer-Ice FILM REEL FOR omemeoimsm APPARATUE Leo Goldhammer and Fol-did Stiefenhofcr. Munique, Germany, aes'ignors to Agra 161: 4; Corporatlon, BinehamtomN.

ticn of New York Apnlloatlon Sentemher 1?, 1931, Serial Not @3342, and in Geny Septelnhcr 29, 193% 8 (mime.

With cmemotogreph apparatuses methods are known of rotating the of friction gearing.

The present invention ing for this p rpose. It gearing of lmown tyne reel is mounted in the interior of the hub of the film reel in such a, manner that it grips fric tionslly.

relates to friction seerdiflers from the friction One form of construction of the invention is illustrated in the annexed drawing, in which Fig. l is at front elevation of the film reel.

Fig. 2 is e section of the line 22? of Fig. l on a. larger scele.

The two flenges l of the film reel ere comrecteol together in known rm .01: by the hub 2.. According to our invention the reel core 3 eolenteol to be errenged on the driving axle of e clnemetogreph epperetm and located in the ln-= terlor or the huh-ls mounted in such e manner that it grips rrlctionelly the reel. In the form of construction illustrated the connection is produced ln the following manner: 0n the core 3. provided with e, flange c, e disc 5 is mounted on the end remote from the flenge e. The outer surfer-cos of the two parts, the ee 4 d the disc 5, ere provided with e friction covering. This covering more he made ofleether or the like. Between the fienee 4' end the ranged e see 7, which presses both parts seetnst the er wells of the flanges of the reel. The sooeresh eped core 3 is driven positively by the axle of the clnematograph appareltwo end re to its movement by means of the s 6 to the reel. Inspire of the feet thet the re of the film reel is driven w"; teke-up reel by nneens in that the core of the reel along the.

'er said flanges, in said disc 5 there is or- (lll. 242- 79) positively, the tension exerted on the bend strength or the tension is determined by the uniform pressing force produced by the spring 7 betweenthe frlction surfaces 6 ancl the lie 1 of the film reel. When the winding operation comes to on end, i. e. when the diameter of the wound-up film hand has become greater, slip takes place between the core of the reel end the film reel.

What we claim is:

1. A film reel for clnemetogrsph apparatus comprising two fienges and e hub holding together said flanges, in seid mm s core, fsstly connected to said core a flange, e cllsc in said huh on the core, and s pressure spring between said flange and sold disc eml pressing both elements against the flanges of the reel. 7

2. A film reel forv cinemetogreph apparatus comprising two flanges end a. hub holding togeth hub a core, lastly connect e. disc in said hub on the on the outer surface of ed to said core o flange, core, a, friction covering said fienge entl sold cllso reel enzl a pressure spring between selcl flange one said 3. A film reel for 'cinemotoersph opnemtue comprising two fienges and a hub holding toeether said flanges, in sold hub a. core, lastly connected to said core a. flange, a. disc in said hub on the core, a leather covering on the outer surface of said flange and seill disc facing the flanges of the reel and a. pressure and said disc.

INAND 80%.

facing the flanges of the spring between said flange 

